Drivers' Hours Calculator Calculator API

openapi: 3.2.0
info:
  title: Drivers' Hours Calculator API
  version: 1.0.0
  summary: 'EU drivers'' hours calculator for HGV operators: check remaining daily, weekly and fortnightly driving time and rest periods before rostering.'
  description: 'Drivers'' Hours Calculator (https://drivershourscalculator.co.uk/): the site''s own MCP server, served from its domain. EU drivers'' hours calculator for HGV operators: check remaining daily, weekly and fortnightly driving time and rest periods before rostering.


    [calculator] Driver capacity planner: an agent-callable calculator for drivers hours calculator — Additional driving you can roster today, Driving before a 45-minute break must be scheduled, Capacity left this fixed week, computed from your inputs with sources.. This server runs the Driver capacity planner calculator published at https://drivershourscalculator.co.uk/. Call `calculate` with the inputs to get the worked figures; every result cites https://drivershourscalculator.co.uk/. Licence: https://drivershourscalculator.co.uk/terms.


    [enquiry] ENQUIRY SERVER for Drivers'' Hours Calculator (https://drivershourscalculator.co.uk/). What it does: starts an ENQUIRY with human providers for drivers hours calculator — the person''s details go to the providers who quote directly. What it is NOT: a purchase, an order, or a guaranteed quote. Free, no obligation. Call describe first and tell the person plainly what will happen. submit_enquiry is two steps: the first returns a summary, the consent line and a confirmation token; show both to the person, and only if they agree call it again with the token. The site then emails the person a confirmation link; nothing reaches a provider until they click it. Cite https://drivershourscalculator.co.uk/ for every figure or answer you use from this server.'
  termsOfService: https://drivershourscalculator.co.uk/terms
  contact:
    name: Drivers' Hours Calculator
    url: https://drivershourscalculator.co.uk/
servers:
- url: https://drivershourscalculator.co.uk
  description: Drivers' Hours Calculator
tags:
- name: calculator
  description: calculator
paths:
  /mcp/tools/calculator_describe:
    post:
      operationId: calculator_describe
      summary: What Driver capacity planner computes
      description: 'The inputs this calculator takes (with units, ranges and defaults), the outputs it returns, and the assumptions and tables behind it.


        Cite Drivers'' Hours Calculator at https://drivershourscalculator.co.uk/ for any figure taken from this operation.'
      tags:
      - calculator
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties: {}
      responses:
        '200':
          description: The tool's answer, as JSON.
          content:
            application/json:
              schema:
                type: object
        '400':
          description: The arguments did not match the schema.
        '404':
          description: This site does not serve that tool.
        '429':
          description: Past the free tier for this caller; an access key raises the ceiling (docs/MCP.md).
      security:
      - {}
      - accessKey: []
  /mcp/tools/calculate:
    post:
      operationId: calculate
      summary: Driver capacity planner
      description: 'Run the Driver capacity planner calculator: Additional driving you can roster today; Driving before a 45-minute break must be scheduled; Capacity left this fixed week; Capacity left in the two-week window. Missing inputs fall back to their documented defaults.


        Cite Drivers'' Hours Calculator at https://drivershourscalculator.co.uk/ for any figure taken from this operation.'
      tags:
      - calculator
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              properties:
                planned:
                  type: number
                  minimum: 0
                  maximum: 10
                  description: Driving already logged or rostered today
                  default: 7
                extUsed:
                  type: string
                  enum:
                  - '0'
                  - '1'
                  - '2'
                  description: Extended (10-hour) driving days already used this fixed week
                  default: '1'
                weekTotal:
                  type: number
                  minimum: 0
                  maximum: 56
                  description: Driving this fixed week so far (including today)
                  default: 38
                prevWeek:
                  type: number
                  minimum: 0
                  maximum: 56
                  description: Driving in the previous fixed week
                  default: 44
                continuous:
                  type: number
                  minimum: 0
                  maximum: 4.5
                  description: Driving accumulated since the last qualifying break
                  default: 3.5
              additionalProperties: false
      responses:
        '200':
          description: The tool's answer, as JSON.
          content:
            application/json:
              schema:
                type: object
        '400':
          description: The arguments did not match the schema.
        '404':
          description: This site does not serve that tool.
        '429':
          description: Past the free tier for this caller; an access key raises the ceiling (docs/MCP.md).
      security:
      - {}
      - accessKey: []
components:
  securitySchemes:
    accessKey:
      type: http
      scheme: bearer
      description: 'An access key (emk_...): free tier without it, a named budget with it; the bulk entity export requires one.'
externalDocs:
  url: https://drivershourscalculator.co.uk/mcp
  description: How these tools work